ASTR 1150 Lecture Notes - Lecture 7: Planetary Nebula, Giant Star, White Dwarf

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14 Jul 2015
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A star"s fate is determined by its initial mass. Much of a star"s mass is ejected during the giant phase (and supergiant phase) The mass left behind in the core is referred to as the core mass or final mass. We will look at the fates of low, medium and high mass stars. High mass stars have the most explosive finish. Too light to produce fusion in core and are never visible. 0. 01 m < mstar < 0. 08 m . Never hot enough for fusion- core temperature less than 10,000,000k. Considered stars because at some point they emit visible light. Core never gets hot enough to fuse he into c. None have ever reached end of main sequence phase. Material packs in as tight as possible. Size of earth- held up by degenerate electron pressure. 1ml weighs the same as a car. Remains of the core of the star. Eventually no longer produce visible light- black dwarfs .

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